I got a reblooming iris a couple of years ago. I planted it in the fall. It was new, so it didn't bloom in the spring, but it did bloom in the fall. Then, last year, it didn't bloom at all. I don't know much about them, except that I've heard they require fertilization, which I didn't do. Does anyone have any further advice on how to take care of them, and get them to bloom? Do they have any trouble in cooler climates, like Wisconsin?